Improvement in wrenches



SMILEY.

Wrenches.

Patented Feb.1|,873.

INYENTOR.

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AM. PHom-Lm/aG/wmc co. N1( osea/ms PRocsssJ UNITED STATES y PATENTOFFICE.

JOSEPH SMILEY, OF FRANKLIN, PENNSYLVANIA.

IMPROVEMENT IN wRENcHEs.V

Specitcationforning part of Letters Patent No. 135,856, dated February1l, i873.

To all whom it may concern: Beit known that 1, JosEPH SMILEY, of

. Franklin, in the county of Venango and State being had to the annexeddrawing making a partfof this specification, and vto the letters andfigures of reference marked thereon.

Figure l-of the drawing is a representation of a side view, partsectional, ot' my wrench. Fig. 2 is a detail view.

This invention has relation to wrenches 5 and consists ih theconstruction and novel arrangement ofthe spring-catch, in the head ot'the stationary jaw, adapted to engage with the reethof the shank of themovable jaw, thereby fixing the same in position lwhen adjusted. Theobject of this invention isto provide the hand-wrench with a simple-andconvenient lock, a'vhereby with but little exertion the jaws may befixed in position relatively whenv properly adjusted to the work.

In the accompanying drawing, the letter A designates the handle carryingthe stationary jaw B of the wrench. The upper portion of the handle orshank is centrally recessed to form a socket, a, for the reception ofthe stern y of the movable jaw. G indicates the movable jaw, which isprovided with a stem, b, designed to extend downward into the socket c,and serrated 011 its front edge to engage with the spring catch E. Atthe upper part of the Asocket a it is extended forward and backward,

as well as somewhat laterally, to form a seat in the body of thestationary jaw, for the reception of the springcatch. rlhis catch is inthe form ofa rectangle, open centrally for the passage of the stem ofthe movable jaw, and `provided at its rear end with a stud, c, whichprojects through an opening, e, in the rear wall 0f the recess,'in whichthe spring-catch is located. Before this catch, within the recess, isarranged a spiral spring, s, which serves to push the catch toward theserrated edge of the stem of the jaw C. A removable steel pin, z, isusually employed to engage with the notches or interspaces of theserrated edge, as it can be easily replaced when worn orbroken.

The lower or stationary jaw is made shorter at v the heel end than themovable'jaw, for the purpose of protecting the stud when the wrench isused as a hammer, the projecting end of the movable jaw serving for thispurpose. i

In the application of this instrument, one hand is ordinarilysufficient. The thumb being placed upon the stud c to disengage thecatch from the stem b, the jaw C is moved outward and adjusted to thework by the forenger. The stud c is then relieved from press ure, andthe catch allowed to engage with the serrated stem, thus securing thejaws in their relative position.

For convenience in the manufacture, the inner face of the stationary jawmay consist 0f a removable plate, as shown at D.

What I claim as my invention, and desire to secure by Letters Patent,is-

In a hand-wrench, the combination, with the recessed and perforatedstationary jaw B, of the serrated stem b of the movable jaw, and thespring-catch E, and thumb-stud c, sub` stantially as specilied. I

In testimony that I claim the above I have hereunto subscribed my namein thevpresence of two witnesses.

JOSEPH SMILEY.

v Witnesses:

MosEs J. GOLMAN, I; L. DEWooDY.

